Where does the term Jerk-O-Matic come from?  I've driven a Select-O-Speeds my whole life. A 971,
871, 6000 and 5200.They all shifted smooth "here". Oh course during my fender riding time. Seems like everytime dad shifted he'd instruct me on how to shift.  We still have the 971 & 5200.

I've used the 5200 with a 500 gal Top-air sprayer for the last three season.  I just wish theere was another gear between 8-9. 

Now the Ford Dual-Power that will give you a jerk then shifting it at 3/4 to full throttle.